Expansible-pipe coupling.



Y .A i o (.L

u To all whom z't may concer/n2.'

sPA'nnow e. nLAeKWoo'n AND VAN E. BRADLEY, orfnALnIan, Noam oAn'oLiN'A.

Be it known that we, SPARRO'W United States, residing at Raleigh, in thecounty of ,Wake and State of North `Carolina, have invented certain newand useful Improvements in EXpansible-PipeA Con-y plings, ofwhich thefollowing is a specification.

This invention relates to an expansible pipe coupling and theprincipal'object of the invention is to provide a coupling by means ofwhich two sections of a pipe 4may be connected to permit the pipe toexpand and'con- .tract when affected by heat and cold without danger 'ofthe coupling being drawn and caused to leak. f

Another object of the invention is to proi Vide a coupling of the typedescribed which is so constructed that itmay be easily put together ortaken apart for repairs or clean.

g. f Another object ofthe invention is to provide a coupling of the typedescribed which will be very simple in construction but which will bevery eiicient'in operation.

This invention is illustrated in the accoml panying drawings .wherein-Figure 1 'is a longitudinal sectional view through the pipe coupling;Fig.'2 is'a view in ,elevation of one of the packing heads car- -ried byone section of the pipe; Fig. 3 is an elevation of one of the packingrings form- 'ing part of the coupler; andvFig. '4 is an elevation ofVthe' packing ring shown in Fig. 3. i i

The coupler' comprises a tubular body portion 10 which has one endportion 11 taperedl and terminating in an internally threaded neck 12'and has its opposite end portion prol vided with an outwardly extendingcollar 13 :which iscut to form a beveled seat '14. The

body portion of the coupler is connected with one section of a pipe andthe second section 15 of the pipe extends into the body portion 10 andis provided with a threaded end portion 16 upon which the head 17 isplaced and the threaded section -18 upon which the head 19 is placed.AThese heads'v 17 and 19 are formed similar to piston heads and areprovided with annular collars 2O in p the edges of which are formedgrooves toreceive the packingrings 21. The auxiliary sectionor cap 22 ofthe coupling is providedV with a' tapered end portion 23 whichterminates in a thickened neck 24 which neck prog Y ratenteareb. s,191e."

' pipe from vbeing yworked loose.

ing Aany danger of leakage.

A permitting the f vides an abutment for the packing rin `s 25 G. BLACK-woon and VAN E. BRADLEY, citizens of the placed inthe tapered endportion 23. A hese packing rings are Aiirmed asv shown in Figs. f 3 and4 and ftftightly within'the tapered? portion 2 3 ofl cap v22 and preventleakage around pipe 15. A spiral spring 26is. placed upon pipe15^between the packing rings 25 and the head 19 so that the pipe-15 willbe normally held in the position shown in Fig.

f1. As the pipes expand and contract from heat and cold the springpermits slidin of the pipe 1'5 within the bodyportion 10 o the couplingthus taking up theY expansion and contraction and preventing the jointsofthe v 22 with the body 'portion of the cou ling `there is pro-y videda collar 27 which E lar 13 and is tightly secured thereto by In Aorderto connect th" cap 'means of bolts 28. The-inner end portion 29 of thecap' ts within the collar. 13 'and' i has its edge beveled to conformtothe contour of the beveled face 14 thus 'permitting i a very tightjoint to be formed which will prevent any danger ofleakage.y It shouldalso be noted that the packing rings 21 will tend to prevent water fromworking intoV the space between the heads and packing rings 25 and thusserve to assist m preventto replacethe packing rings 25 and 21 the bolts28 can beremoved andthe cap 22 then s lid upon the pipe 15 to a positionwhich will permitl the packing rings 25 to be removed and new ones putin place.

The body portion 10 can then be unscrewed `from the pipe with which itis connected and slipped oii of the heads 17 and 19 thus heads to beremoved for the purpose of repair or if it is' only desired to renew alpipe aiectedf-by heat and cold such asa steam or, hot water pipe may beconnected to permit of expansion and contraction.y It will also be notedthat this coupling is very ts against the col- 75 If it isdesired thepacking rings carriedby the head the'packing rings "can be removedwithout' f the heads being removed. The coupling #can then be veryeasily reassembled and held in the assembled position-by the bolts 28,.We have therefore provided a coupling ,which is so'constructed that twosections o 1. A pipel coupling comprising a tubular so l ics

body portion having one end tapered and terminating in an internallythreaded neck, the opposite endy portion being provided with anoutwardly extending collar having its inner portion cut to form abeveled bearing surface, a pipe extending into said body portion andhavin its inner end portion threaded, a plurality of l heads threadedupon the inner end portion of said pipe and positioned in spacedrelation and provided with .annular'ribs having grooves formed therein,packing rings ,mounted in the grooves of saidpheads, a cap fitting aboutv said pipe and having one end portion extending into thecollar of saidbody portion andy conforming` to the contour of the interior thereof, acollar for said cap engaging the collar of said bod portion andremovably connected therewith, the outer end portion of said cap beingtapered and ter` minating in a thickened neck forming an abutmentshoulder, packing rings placed within thetapered portion of said capabout said pipe, and a spring positioned about said pipe between saidlast named packing rings and one of said heads.

2. A pipe coupling comprising a tubular body portion having one Tlendportion provided with an outstanding collar, a pipe extending into saidbodyportion and having its innerjend portion threaded, a plurality ofheads threaded upon the inner end portion of said pipe and positioned inspaced relation and provided with annular ribs having grooves formedtherein, packing rings mounted in the grooves of said heads,

SPARROW G. BLACKWOOD. VAN E. BRADLEY.

Witnesses:

y S'. S. BRADLEY, J. N. KEELIN, Jr."

